Problems on Ages- Aptitude Questions and Answers - in Hindi

 The average age of 5 members of a family is 21 years. If the age of the youngest member be 5 years,find the average age of the family at the time of the birth of the youngest member? एक परिवार के 5 सदस्यों कि औसत आयु 21 वर्ष है । यदि सबसे छोटे सदस्‍य की आयु 5 वर्ष है, तो उसके जन्‍म के समय परिवार की औसत आयु ज्ञात करे ? A) 24 years B) 25 years C) 20 years D) 28 years Correct Answer : 20 years Explanation :At present the total age of the family = 5 * 21 = 105 The age of the youngest member be 5 years The total age of the remaing family member during 5 year 4*5=20 after birth of youngest member The total age of the family at the time of the birth of the youngest member that is 5 year ago => present the total age of the family -age of the youngest member- change in total age of the remaing family member during 5 year => 105-5-20 = 80 Therefore, average age of the family at the time of birth of the youngest member =>total age of the family at the time of the birth of the youngest member / number of member in family at the time of birth of the youngest member =>80/4 = 20 Post/View Answer Post comment Cancel Thanks for your comment.! Write a comment(Click here) ...